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Finding the Fourth Proportional to 423,747.38, 635,714.70 and 139,426.45

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Solution

The fourth proportional to 423,747.38, 635,714.70 and 139,426.45 is: 209,170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,747.38 : 635,714.70 = 139,426.45 : x
  2. Step 2: Convert to fraction form
    423,747.38/635,714.70 = 139,426.45/x
  3. Step 3: Cross multiply
    423,747.38x = 635,714.70 × 139,426.45
  4. Step 4: Simplify right side
    423,747.38x = 88,635,441,721.68
  5. Step 5: Solve for x
    x = 88,635,441,721.68/423,747.38
  6. Step 6: Final answer
    x = 209,170.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.